$4a^4=2a^3$
$28+56t+28w$
$7\:+\:7\:x\:1\:-\:2\:+\:5$
$\left(3x^2\right)^{-2}\left(4x\right)^2$
$\frac{2560}{10}$
$\frac{4x^5+2x^3-3x\:+1}{x^2-2}$
$\left(-1\right)\cdot34$
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